/ Dictionary / Index C co-occur: Meaning and Definition of Find definitions for: co-oc•cur Pronunciation: (kō"u-kûr'), [key] — -curred, -cur•ring. to appear together in sequence or simultaneously. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: co-occur (Thesaurus) cooboo cooch Related Content Daily Word Quiz: arboreal Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language